Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Prehnite from
Huken Quarry, Grorud, Oslo, Norway


Locality type:Quarry
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Huken Quarry, Grorud, Oslo, Norway
Data Identifiers
Mindat Occurrence Record ID:169704
Long-form Identifier:1:3:169704:9
GUID (UUID V4):0
Nearest other occurrences of Prehnite
3.4km (2.1 miles) ⓘÅrvollåsen Natural Monument, Oslomarka, Oslo, Norway
18.0km (11.2 miles) ⓘBallerud, Bærum (Baerum), Akershus, Norway
22.8km (14.2 miles) ⓘErdmann Mine, Engelstadvangen, Elsjø Mining Field, Nannestad, Akershus, Norway
33.3km (20.7 miles) ⓘKalkovnen, Østhagan Nature Reserve, Grua mining district, Lunner, Akershus, Norway
33.4km (20.7 miles) ⓘGrua Tunnel, Grua, Lunner, Akershus, Norway
33.4km (20.8 miles) ⓘAsdøljuvet (Astøljuvet), Lier, Buskerud, Norway
36.5km (22.7 miles) ⓘLierskogen Quarry, Lierskogen, Lier, Buskerud, Norway
45.7km (28.4 miles) ⓘHurum pukk AS Quarry, Filtvet, Hurum, Asker, Akershus, Norway
47.1km (29.3 miles) ⓘStrømsås tunnel, Drammen, Buskerud, Norway
48.8km (30.3 miles) ⓘE 134 Road, Drammen, Buskerud, Norway
References
Kvamsdal, Lars O. (1999) Mineralene fra Huken pukkverk i Oslo [The minerals from Huken Quarry in Oslo]. STEIN. Nordisk magasin for populær geologi, 26 (4) 14-47
 
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